How to open Javadoc JAR file in web browser Rename the file redpen-plugin-1.10.3-javadoc.jar to redpen-plugin-1.10.3-javadoc.zip Use your favourite unzip tool (WinRAR / WinZIP) to extract it, now you have a folder redpen-plugin-1.10.3-javadoc Double click index.html will open the index page on your default web browser. How to generate Javadoc from a source JAR? Running the command javadoc: javadoc --ignore-source-errors -encoding UTF-8 -sourcepath "redpen-plugin-1.10.3-sources.jar" -d "redpen-plugin-1.10.3-javadoc" -subpackages
